in reference to Mercalli scale, 1900, named for Italian geologist Giuseppe Mercalli (1850-1914), who invented it ("I Terremoti della Liguria e del Piemonte," Naples, 1897). It was a modification of the Rossi-Forel scale (1883).
Examples from the Web for mercalli
The only complete map of the isoseismal lines is that drawn by Professor Mercalli.
Professor Mercalli represents the motion diagrammatically by the curve a in Fig. 35.
Professor Mercalli regards Mallet's method with greater favour than most seismologists.
In estimating this quantity, Professor Mercalli takes intensity as well as frequency into account.
Professors Taramelli and Mercalli have made a careful study of the subject of this section.